Controller to Controller Communication

Question 1

What is Ethernet/IP?

Answer 1

A controller to controller protocol that is based on CIP (Common Industrial Protocol)

Question 2

What are the 2 most common types of messaging in Ethernet/IP?

Answer 2

Explicit: a type of messaging that uses programming language to send a message to one other controller ONLY.

Implicit: uses a producer/consumer messaging that is configured by adding controller I/O. Allows data to be sent from one controller to many others.

Question 3

What tags are used in implicit and explicit messaging?

Answer 3

Global/controller tags

Question 4

What does a controller need to be able to communicate?

Answer 4

A communication driver

Question 5

What are the 2 characteristics of a driver?

Answer 5

1) Come in different languages
2) Ca be native or OPC (Open Protocol Communication)

Question 6

What is OPC DA and OPC UA and what are their differences and similarities?

Answer 6

OPC Data Access and OPC Unified Architecture are both server/ client models. OPC DA runs strictly on windows and has no security but OPC UA is platform independent and has encryption.

Question 7

What is a function of a server?

Answer 7

To collect and store data such as tags, values, quality, and timestamp

Question 8

What is the purpose of OPC Test Client?

Answer 8

Test Client lets you verify that you can can access information from a server.